STI Publications - View Publication Form #19801
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Publication Information
| Title | Instanton effects in twist-3 generalized parton distributions | ||||
| Abstract | The instanton vacuum picture is used to study hadronic matrix elements of the twist-3 (dimension-4, spin-1) QCD operators measuring the quark spin density and spin-orbit correlations. The QCD operators are converted to effective operators in the low-energy effective theory emerging after chiral symmetry breaking, in a systematic approach based on the diluteness of the instanton medium and the 1/Nc expansion. The instanton fields induce spin-flavor-dependent "potential" terms in the effective operators, complementing the "kinetic" terms from the quark field momenta. As a result, the effective operators obey the same equation-of-motion relations as the original QCD operators. The spin-orbit correlations are qualitatively different from naive quark model expectations. | ||||
| Author(s) | Jun-Young Kim, Christian Weiss | ||||
| Publication Date | January 2024 | ||||
| Document Type | Journal Article | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Theory & Comp Physics / THEORY CENTER / THEORY CENTER | ||||
| Funding Source | Nuclear Physics (NP) | ||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
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| Associated with an experiment | No | ||||
| Associated with EIC | No | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Journal Article
| Journal Name | Physics Letters B |
| Refereed | No |
| Volume | 848 |
| Issue | |
| Page(s) | 138387 |
Attachments/Datasets/DOI Link
| Document(s) |
instanton_twist3_letter.pdf
(STI Document)
2310.16890.pdf
(Accepted Manuscript)
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| DOI Link | |
| Dataset(s) | (none) |
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